`2H_(2)(g)+O_(2)(g)to2H_(2)O(l)+xkJ` In the above reaction

Options

A. `zkJ mol^(-1)` is the value of `DeltaH_(f)` for water
B. `DeltaH_(f)` of `H_(2)O(l)` is `-xkJ`
C. `DeltaH_(f)` of `H_(2)O(l)` is `-x//2kJ mol^(-1)`
D. `DeltaH_("comb")` of `H_(2)` is `-x//2kJ mol^(-1)`

Answer

C, D

Explanation

Both `(C )` and `(D)` statements about the reaction are correct.